Meridian App Privacy

Last updated: July 16, 2026

Meridian ("the app") is designed to be private by default. This policy explains what the app does and does not do with your information. It covers the Meridian iPhone and Apple Watch app only; the ketoshealth.com store has its own privacy policy.

The short version

Meridian does not collect, transmit, sell, or share your personal data. There is no account, no analytics, no advertising, and no third-party tracking. Everything you log stays on your device and, if you use iCloud, in your own private iCloud account. We never see it.

Information stored on your device

When you use Meridian, the following is saved locally on your device so the app can work and remember your progress:

  • Your fasts (start and end times, chosen protocol, hydration, and any notes or "how you felt" entries you add)
  • Your streaks, achievements, goals, and reward points
  • Biomarker readings you enter (ketones, glucose, weight)
  • Your settings (e.g., units, reminder preference, weekly goal)

This information is never sent to us or to any third party. It is removed if you delete the app or use "Reset all data" in Settings.

iCloud sync

If your device is signed in to iCloud, Meridian keeps the data above in sync across your devices using Apple's iCloud key-value storage. This data is stored in your private iCloud account and is encrypted by Apple in transit and at rest. Meridian has no servers: we cannot read, access, or recover anything you sync. If you are not signed in to iCloud, everything simply stays on the device.

Apple Health (HealthKit)

If you choose to connect Apple Health, Meridian can save the weight you log to Apple Health. That is the only Health permission the app asks for: Meridian does not read any data from Apple Health.

Health data is processed only on your device and is never transmitted to us or any third party. You control this access at any time in iOS Settings → Privacy & Security → Health, or in the Apple Health app. Health data is never used for advertising, is not used for any purpose other than showing it to you inside the app, and is not included in iCloud sync by the app.

Notifications

If you enable reminders, Meridian schedules local notifications on your device to nudge you at key fasting milestones. These are generated on-device; no notification content is sent to a server.

Children

Meridian is intended for general audiences and is not directed at children under 13. We do not knowingly collect information from children.

Changes

If the app later adds accounts, analytics, or other features that send data to us or to third parties, this policy will be updated and you will be asked to consent before any such data leaves your device or your iCloud.

Contact

Questions about this policy or your privacy? Contact us at privacy@ketoshealth.com or via ketoshealth.com.

Meridian is a wellness and educational tool, not a medical device, and does not provide medical advice.